Rim breaker



F. M. ROSS.

BIM BREAKER.

APPLICATION FILED MA Y 8. 1920 1,402,660. I I Patented Jan. 3, 1922.

2 SHEETS-SHEET I.

a 1; V avwawtoz F. M. ROSS. RIM BREAKER.

APPEICATION FILED MAY 8. 1920.

1 40v2 660 Patented Jan; 3, 1922. v

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i; J}, M 1/1 STTS FREDERICK 1VI. ROSS, 01E CINCINNATI, OHIO.

RIM BREAKER.

a Specification of Ietters'Patent. P t t 3, 1 2

Application filed May 8, 1920. Serial No. 380,950.

To cZZwhom it may concern:

Be it known that I, Fnnnnnron' M. Ross, a citizen of the United Statesof America, and a resident of Cincinnati, in the county of Hamilton andState of Ohio, have invented a new and useful Improvement in RimBreakers, of which the following is a specification.

An object of my invention is to provide a rim contractor that willoperate upon any split rim regardless of size or type.

Another object of my invention is to provide a device for the purposestated, for use especially in garages'and repair shops, where a machinemust withstand hard usage, and must be adapted to be quickly adjustedand operated. a i i Another object ofmy invention is to produce amachine wherein the power exerted by the operator will be-multipliedmanifold by the device,-in its operation upon the rim.

These and other objects are attained by means described herein anddisclosed in the accompanying drawing in which:

Fig. 1 is a plan view of a rim contractor embodying my invention,mounted upon a workbench, and operating upon a rim.

Fig. 2 is a sectional view on line 2--2 of Fig. 1. i

Fig. 3 is an enlarged sectional view on line 3-3 of Fig. 1. j I

Fig. i is a bottom plan view showing the means and method employedforattaching a handle to the lever, all of which form details of myinvention.

Fig. 5 is an enlarged sectionalview on line 5-5 of Fig. 1.

Fig. 6 is a plan view, on enlarged scale, of the radial. reciprocatingmeans forming a detail of my invention; 7 v

A is a base plate fixed to and above the Y bench or platform by anglebrackets a and 1 B is a plate or lever which is movable longitndinallyof itself and is pivoted for circumferential movement on A. A designatesa bell crank lever comprisingan arm a integral with the post a pivotedin a sleeve a? projecting below the plate A. The post a is provided witha handle a fastened to the post by a cotter pin a. The bell crank leverA through link a connected at a to the arm a and at a to the movableplate or lever B is used to swing the lever B circumferentially towardand away from the fixed plate A. The link 6 pivoted at one end on theshoulder bolt 6 passing through the slot b in the movable plate B hasits other end pivoted to the handle lever b pivoted on the machine screw79* inserted in the movable plate B. The method of mounting the plate 13for movementon theplateA and of the handle lever b is shown in Fig. 5where the bolt 6 having a shoulder b resting on the plate A is fastenedby a nut Z9 The clamping devices F and F fixed respectively to theplates A and Bare con-.

structed similarly to one another. The lower aw f of the device F isbolted to the outer end of plate A by means of'the screw f. The upper awf is supported in vertical alignment with the jaw f, by means of the adustlng screw f and the adjustable screw bolt 7. The upper end of theadjusting screw f is threaded, and engages in a thread ed way formed inthe rear of the upper jaw f and extends beyond the upper sur' face ofsaid jaw. The lower end of the screw f is loosely seated in a socketinthe base plateA and lower jaw f. The bolt 7 has its lower end inthreaded engagement with the base plate Aand lower jaw f and above itsthreaded portion is a smooth portion which passes loosely through a holein the upper aw. The upper end of the screw bolt, extends above theupper'surface of the jaw f and has an eye 7 formed in it. The

handle 7 is attached to the bolt '7 by means of the pin 7" extendingthrough the lugs 7 and f formed on'the lower end of the handle f andthrough the eye in the bolt,

the end of which bolt extends between the lugs. A washerv 775 is mountedabout the bolt 7 between the upper surface of the jaw f and the handle7. "The pin is spaced closer, relatively to the lower edges f than tothe side edges. f, of the lugs, the corners I moved in acounter-clockwise counter-clock-wise pivot Z2 secures the'link b toplateA and rim oenterward. moved ina clockw1se direction untll thespaced between the clamping devices F and F The handle a is moved tosuch position as is shown in Fig. 1, when the clamp F is to be securedto the rim. The jaws are secured upon the rim by first adjusting thejaws so" that they will be spaced apart at a distance slightly greaterthan the width of the rim,

f and the handle f moved to a horizontal position, whereby the jaws willclamp the rim between them. The screw i serves to bind the rear ends ofthe jaws and prevents them being moved'together when the handle f ismoved to a horizontal position. The adjustment of the jaws isaccomplished by jointly screwing the bolt 7? and screw 7 through thejawsf and 7 respectively At ter the jaws are securely attached to the twoends of the rim, the lever handle'a is direction thereby forcing apartthe ends of the; rim. The handle 6- is then turned in-a clock-wisedirection thereby drawing the endc of the The handle a is then end 0overlaps the end 0 of the rim. The rim is then released and the tirevremoved.

Rims of the type shown in Fig.1 do notrequire that handle a be firstmovcd'in a direction. The fixed permits the link 5 to be revolved aboutsuch pivot. The handle 6 is pivoted to link 7) by means of pivotb andtherefore can revolve about both pivots b and 6 The handle I) in turn'is pivotally attached to the plate B, therefore, the plate B can revolveabout the pivots b and 6 Link a of lever A limits the extent to whichthe: plate B can be rot'ated'about thepivot, Z2 and the slot in plate B,through which the pivot b 7 passes converts the rotary movement of plateinto a'radial reciprocating movement; Pinsb and 6? limit the movement ofthe handle I); Y

The force, exerted'by the machine upon a rimcan'be increasedproportionally inrelation to-the force applied'by the operator by makingthe handles ai and 6' longer, or by using an extension handle that canbeap plied to the said handles, because of theinicreased leverage uponvthe fulcrum and the place of resistance.. The space between the fulcrumandthe place of resistance is small relatively to the length of thehandle, at

v the end of which the-operating force is applied.

1. A rim breaker comprising a base plate I having atone end arim clamp,a movable plate having a rim clamp at the corresponding'end, a leverdevice and a link connected thereto, and each pivoted one to the baseplate andthe other to the movable plate to move the-rim clamps towardand from each other, another lever and link device connected togetherand one pivoted to the movable plate and the other to a .fixedpivot, tomove said movable plate longitudinally, there being means for guidingthe movable plate so that its longitudinal movement is radial to saidpivot.

2. In a rim breaker the combination of a 'fixed base plate, a movableplate having a clamping jaws at the outer ends of the plates, a fixedpivot passing through the slot, a lever and link device connecting theouter ends of theplates and adapted to move theclampingxjaws toward andfrom each other, a lever mounted upon the movable plate and a linkconnecting the. last mentioned lever to said fixed pivot.

3. Ina rim breaker the combination of a base plate, a movable plate, a.pivot connect-- plate upon the base plate circumferentially thereto. r

4. Ina rim breaker the combination ofa base plate, a slotted movableplate, a pivot mounted on the base plate extending through the slot inthe movable plate, means adapted to radially reciprocate the movable;plate comprising a lever pivotallymounted upon the movable plate and alink pivotally mounted upon the lever engaging the pivot extendingthrough the slot in the movable plate, means adapted tocircumferentially reciprocate the movable plate comprising a leverpivotally mounted upon the base plate, a link and pivots connecting thelast mentioned link to the lever and to the movable plate, and rimclamping jaws mounted on the outer, ends of the plates.

In witnesswhereof I have hereunto subscribed my name this 28th day ofApril, 1920.

FREDERICK M. Ross.

